A guide for finding current official documentation about OpenAI products and APIs. It covers tools such as Codex, Responses, Chat Completions, Apps SDK, Agents SDK, and Realtime.

Use it to answer implementation questions, check product capabilities and limits, and provide documentation-based guidance with citations.

It reduces the risk of relying on outdated or unofficial instructions when building with OpenAI services.

openai-docs — Skill for Codex by KunanonJ/ai-skills-hub

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add KunanonJ/ai-skills-hub --skill openai-docs

Clone the repo

git clone --depth 1 https://github.com/KunanonJ/ai-skills-hub

Made for: Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/kunanonj/ai-skills-hub/openai-docs/github.svg)](https://agentmods.dev/skills/kunanonj/ai-skills-hub/openai-docs)

Your own site

<a href="https://agentmods.dev/skills/kunanonj/ai-skills-hub/openai-docs"><img src="https://agentmods.dev/badge/skills/kunanonj/ai-skills-hub/openai-docs/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/kunanonj/ai-skills-hub/openai-docs"><img src="https://agentmods.dev/badge/skills/kunanonj/ai-skills-hub/openai-docs.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 74 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 782 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin 100% copy Near-identical to another mod in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00074	$0.00782
Opus 5.5	$0.00030	$0.00313
Sonnet 5.5	$0.00015	$0.00156
Haiku 4.5	$0.00007	$0.00078

Measured 1mo ago against content hash 100099568ce8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

openai-docs scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

100% identical to openai-docs — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/skills/openai-docs/SKILL.md · 57 lines

How it starts

The opening of the file, as written. The whole thing — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OpenAI Docs

Provide authoritative, current guidance from OpenAI developer docs using the developers.openai.com MCP server. Always prioritize the developer docs MCP tools over web.run for OpenAI-related questions. Only if the MCP server is installed and returns no meaningful results should you fall back to web search.

Quick start

Use mcp__openaiDeveloperDocs__search_openai_docs to find the most relevant doc pages.
Use mcp__openaiDeveloperDocs__fetch_openai_doc to pull exact sections and quote/paraphrase accurately.
Use mcp__openaiDeveloperDocs__list_openai_docs only when you need to browse or discover pages without a clear query.

OpenAI product snapshots

Apps SDK: Build ChatGPT apps by providing a web component UI and an MCP server that exposes your app's tools to ChatGPT.
Responses API: A unified endpoint designed for stateful, multimodal, tool-using interactions in agentic workflows.
Chat Completions API: Generate a model response from a list of messages comprising a conversation.
Codex: OpenAI's coding agent for software development that can write, understand, review, and debug code.
gpt-oss: Open-weight OpenAI reasoning models (gpt-oss-120b and gpt-oss-20b) released under the Apache 2.0 license.
Realtime API: Build low-latency, multimodal experiences including natural speech-to-speech conversations.
Agents SDK: A toolkit for building agentic apps where a model can use tools and context, hand off to other agents, stream partial results, and keep a full trace.

If MCP server is missing

If MCP tools fail or no OpenAI docs resources are available:

Run the install command yourself: codex mcp add openaiDeveloperDocs --url https://developers.openai.com/mcp
If it fails due to permissions/sandboxing, immediately retry the same command with escalated permissions and include a 1-sentence justification for approval. Do not ask the user to run it yet.
Only if the escalated attempt fails, ask the user to run the install command.
Ask the user to restart Codex.
Re-run the doc search/fetch after restart.

Read the full file on GitHub · 57 lines

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago First seen · 57 lines · 74 tokens per session scan A 100099568ce8

Subscribe to this mod's changes

openai-docs is a skill published in the GitHub repository KunanonJ/ai-skills-hub (5 stars, last pushed 1mo ago), licensed MIT. It adds 74 tokens to every session and 782 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to openai-docs, differing in 2 lines, and is treated as a copy.

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